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Vocabulary
Vocab words for math test
| Term | Definition |
|---|---|
| point | location |
| line | 2 or more points (on a line) that extends forever in both directions |
| plane | flat surface with 3 or less points |
| co-linear points | points on same line |
| co-planar points | points on same plane |
| line segment | can be measure and has endpoints |
| ray | part of a line that goes forever in one direction |
| opposite rays | 2 rays with same endpoint and go forever in opposite directions |
| angle | 2 non co-linear rays with common endpoint |
| vertex | common endpoint of an angle |
| obtuse angle | greater than 90 degrees less than 180 degrees |
| acute angle | less than 90 degrees greater than 0 degrees |
| right angle | exactly 90 degrees |
| straight angle | exactly 180 degrees |
| adjacent angles | angles that share an endpoint and a side |
| angle bisector | ray that divides an angle into 2 congruent angles |
| segment bisector | segment line or plane that intersects at a segments midpoint and forms 2 congruent segments |
| vertical angles | 2 nonadjacent angles formed by 2 intersecting lines and are congruent |
| linear pair | 2 adjacent angles that create a 180 degree angle |
| complementary angles | 2 angles sum to 90 degrees |
| supplementary angles | 2 angles sum to 180 degrees |
| counterexample | example that shows a statement is false |
| theorem | statement as a result of other true statements |
| postulate | rules accepted without proof |
| conjecture | unproven statement based on observations |
| congruent | same exact size shape and/or measure |
| midpoint | divides segment into 2 congruent segments |
| area | square units that cover a surface |
| circumference | distance around circle |
| degree | measure angles and arcs |
| volume | space a 3-D figure fills |
| surface area | sum of all face and side areas |
| perimeter | sum of lengths of all sides of a figure |
| parallel | lines with same slope |
| perpendicular | lines with opposite reciprocal slope |
Created by:
edenbreslauer
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